Javascript 将console.time结果写入变量

是否可以将

console.time（）

result写入变量

console.time('It\'s saved!');
fn();
var a = console.timeEnd('It\'s saved!');
console.log(a) // => It's saved!: 16ms

没有，但是你可以用它来代替

---

我知道这个问题有点老了，但现在您可以在Node.js中使用：

const {performance} = require('perf_hooks');
const start = performance.now();
fn();
const end = performance.now();
console.log(`${end - start}ms`);

或者使用

timerify（）

：

注意：性能api是在节点v8.5.0中添加的。

const {performance} = require('perf_hooks');
const start = performance.now();
fn();
const end = performance.now();
console.log(`${end - start}ms`);

const {
  performance,
  PerformanceObserver
} = require('perf_hooks');

function fn() {
 // some stuff here
}

const wrapped = performance.timerify(fn);

const obs = new PerformanceObserver((list) => {
  console.log(list.getEntries()[0].duration);
  obs.disconnect();
});
obs.observe({ entryTypes: ['function'] });

// A performance timeline entry will be created
wrapped();